Use the data given below to answer the following question.

The details of the clock sales at a supermarket for the past 6 weeks are shown in the table below. The time series appears to be relatively stable, without trend, seasonal, or cyclical effects. The simple moving average value of k is set at 2.

Week	Units sold
1	88
2	44
3	54
4	65
5	72
6	85

For the given data, calculate the value of the simple moving average mean absolute percentage error.

Select one:

a. 14.39

b. 20.90

c. 23.45

d. 25.56